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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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marsupials中的不完整的血统分类和表型演变

Shaohong Feng1, Ming Bai2, Iker Rivas-González3

  • 1BGI-Shenzhen, Shenzhen 518083, China; State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.

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|April 21, 2022
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概括
此摘要是机器生成的。

不完整的血统分类 (ILS) 解释了为什么有袋动物的基因组显示出相互矛盾的进化信号,将古代的快速物种化与形态变异联系起来. 这项研究提供了ILS影响有袋动物表型特征的经验证据.

关键词:
煤炭HMM生物地理基因表型不一致血质增生不完整的血统分类类动物蒙尼托德尔蒙特遗传学推断快速物种化特性演变

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科学领域:

  • 进化生物学
  • 基因组学
  • 遗传学

背景情况:

  • 不完整的谱系排序 (ILS) 导致基因树和物种树的不一致,使进化研究复杂化,特别是在像人类这样的快速物种化谱系中.
  • 缺乏将ILS与不一致的表型变异联系起来的经验证据,阻碍了对其进化影响的充分理解.

研究的目的:

  • 调查不完整的血统分类 (ILS) 在产生不一致的基因信号和有袋动物的表型变异中的作用.
  • 为ILS提供经验证据,直接促进袋鼠快速物种化过程中的形态特征进化.

主要方法:

  • 对有袋动物的基因组进行了基因组分析,以重建进化关系并确定ILS的模式.
  • 分析基因组数据以检测在基因组中具有随机固定性的冲突基因信号和基因.
  • 进行功能实验以评估ILS对形态特征发展的影响.

主要成果:

  • 建立了monito del monte作为所有澳大利亚有袋动物的姐妹血统,超过31%的基因组显示出由于ILS而与Diprotodontia更接近.
  • 通过基因组识别了普遍的相互矛盾的基因信号,与现存的有袋动物观察到的形态变异相关.
  • 在ILS期间检测到数百个具有随机固定的基因,导致非姐妹物种的氨基酸序列相同.

结论:

  • 不完整的血统分类对有袋动物的基因组学产生了重大影响,解释了基因组的不一致性和澳大利亚有袋动物的进化历史.
  • ILS在形态特征中直接促进了半细胞形成,证明了它在大约6000万年前快速的有袋动物物种化过程中塑造表型多样性的作用.